Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: Cut Chemist on 09/05/2006 05:07:30

Title: Purifying HCl
Post by: Cut Chemist on 09/05/2006 05:07:30

Does Anyone know the procedure for purifying 6 N HCl
or even a link to show me how to distill it.

I'm a graduate student and my prof was telling me that you're supposed to look for the constant boiling point??

I've distilled many things in my day, but not acid.
6 N HCl is going to be a solution of Cl-, H+, and H2O obviously [:D]

but, what is the boiling point??
does it depend on concentration??
and if so why??

I would figure if you distill 6 N HCl you would get pure H2O
or pure HCl not a mixture. [^]

Any help or links would be greatly appreciated [:)]

Title: Re: Purifying HCl
Post by: Cut Chemist on 09/05/2006 05:10:34

I am familiar wit the term azeotroph (sp??)
as with alcohol and water

Is this why??
and how do I know what concentration will result??

Title: Re: Purifying HCl
Post by: lightarrow on 12/08/2006 22:34:07

quote:

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Originally posted by Cut Chemist

Does Anyone know the procedure for purifying 6 N HCl
or even a link to show me how to distill it.

I'm a graduate student and my prof was telling me that you're supposed to look for the constant boiling point??

I've distilled many things in my day, but not acid.
6 N HCl is going to be a solution of Cl-, H+, and H2O obviously [:D]

but, what is the boiling point??
does it depend on concentration??
and if so why??

I would figure if you distill 6 N HCl you would get pure H2O
or pure HCl not a mixture. [^]

Any help or links would be greatly appreciated [:)]

---

What exactly do you mean with the term purifying? Increasing its concentration? Making HCl gas? Then, mix it with concentrated H2SO4 or P4O10, for example, and then distill; or you can mix concentrated H2SO4 with NaCl.